No and no, higher. lol My daughter will be 5 in a few weeks and weighs 32lbs. So no, we didn't.

My son is a little past 3 and a half. He's 43lbs undressed. So 40lbs wouldn't help. He would need 45lb limit or more. He is now FFing because he's close, clothing adds a little weight, and I didn't want to push it too close.